Axel beetil laftman



Dec. 28, 1926.

A. B. L AFTMAN MUFFLI NG LT THOPONE Filed Se Patented Dec. 28, 1926.

UNITED STATES' PATENT OFFICE;

AXEL BERTIL LAFTMAN, 0F GRASSELLI, NEW JERSEY, ASSIGNOR TO THE GRASSELLI CHEMICAL COMPANY, 0F CLEVELANDpOI-IIO, A. CORPORATION OF OH IO.

MUFFLING LIITHoPoNE.

Application fil ed September 24, l1925. Serial No. 58,344i

In the manufacture of lithopone, it has heretofore been thepracti'ce to calcine the raw or crude lithopone in mufiles from which it is raked out into a quenching 'tank a full of Water.. The lithoponc coming from the muflie is at a red-heat and is very readily oxidized' v -I have discovered that this oxidation may be obviated by'spraying the red-hot mateo m yrial as it leaves the door of the furnace and v materialis vdropped from the apron into the 25 quenching water, and also.. the absor-ptionof, gases discharged from the furnace, thus improving the Working conditions for the operators. a I

The mode of operation Will be readily understood from the accompanying 'diagrammatic drawings in which:

Fig. l is a Sectional velevation; and' Fig. 2vis an end elevation.

The walls-of the nufile are shown at A and A'. In front of the opening is a pan B, and C, CC are Water spraying pipes. D is the usual quenching tank or buggy. The red-hot material in a layer ofI from 12 to 15 inches deep is r'akedout of the furna'ce over the apron, 'where it is subjected to the sprays of water from pipes C,'C, C',

and then drops into the quenching buggyl D Wherel it is completely quenched. I claim:

An improvement in muffiing lithopone Which consists in spraying with Water the hot calcined mass as it leaves the furnacel` o and then dropping it into a^quenching body of water. v

Injtestmony whereof, I afiix my signature.

v 'AXEL BERTIL LAFTMAN. 

